package com.helloworld.chat.filter;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

/**
 * Created by xdzy on 2017/6/30.
 */
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        String url=request.getRequestURI();
        if(url.contains("/user/")){
            filterChain.doFilter(servletRequest,servletResponse);
            return;
        }
        HttpSession session=request.getSession();
        if(session.getAttribute("loginUser")==null){
            response.sendRedirect(request.getContextPath()+"/user/user_loginForm.action");
        }else{
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }

    @Override
    public void destroy() {

    }
}
